Vibration damping system and method for variable speed wind turbines

a wind turbine and variable speed technology, applied in the field of active vibration damping solution for variable speed wind turbines, can solve the problems of adversely affecting the life of the turbine components, poor passive damping characteristics, and torque oscillation in the drive train
US20060066111A1Active Publication Date: 2006-03-30GENERAL ELECTRIC CO
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
GENERAL ELECTRIC CO
Publication Date
2006-03-30

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Abstract

A vibration damping technique for a wind turbine system is described. The wind turbine system includes a vibration damper, which provides a variable signal to control torque produced by a generator of the wind turbine system. The variable signal is based on generator speed and has a first local peak value based on a resonant frequency of tower side-to-side oscillation.
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Description

BACKGROUND

[0001] The invention relates generally to the field of wind turbines, and in particular to an active vibration damping solution for variable speed wind turbines.

[0002] Wind turbines are regarded as environmentally safe and relatively inexpensive alternative sources of energy. A wind turbine generally includes a rotor that has multiple blades which transform wind energy into a rotational motion of a drive shaft. The drive shaft is utilized to rotate a rotor of an electrical generator. The turbine rotor is rotationally coupled to the generator by a drive train comprising a gear box. The gear box steps up the relatively low rotational speed of the turbine rotor to a more appropriate speed for the generator to efficiently convert the rotational motion to electrical energy. The electrical energy may then be supplied to a utility grid. Typically, the drive train and the generator are housed in a nacelle mounted atop a tower.

[0003] Wind shear on the rotating blades causes peri...

Claims

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